/* ===== 竖式谜填空生成器 ===== */
#mrApp .mr-hero { text-align: center; padding: 12px 10px 0; }
#mrApp .mr-hero h1 { font-size: 30px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#mrApp .mr-hero p { font-size: 15px; color: var(--c-text-sub); line-height: 1.7; }

#mrApp .mr-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; align-items: center; margin: 18px 0; }
#mrApp .mr-tab {
    border: 2px solid var(--c-primary); background: transparent; color: var(--c-primary);
    border-radius: 999px; padding: 9px 18px; font-size: 14px; font-weight: 700;
    cursor: pointer; transition: background .15s, color .15s;
}
#mrApp .mr-tab.is-on { background: var(--c-primary); color: #fff; }
#mrApp .mr-select {
    border: 1px solid var(--c-border); background: var(--c-surface); color: var(--c-text);
    border-radius: 999px; padding: 8px 12px; font-size: 14px; font-weight: 700; outline: none; cursor: pointer;
}

#mrApp .mr-ctrl { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 0 0 18px; }
#mrApp .mr-btn {
    border: none; border-radius: 999px; padding: 12px 20px; font-size: 15px; font-weight: 700;
    color: #fff; cursor: pointer; background: linear-gradient(135deg, var(--c-primary), var(--c-accent-cyan));
    box-shadow: var(--shadow-md);
}
#mrApp .mr-btn.gray { background: var(--c-surface-2); color: var(--c-text); box-shadow: none; border: 1px solid var(--c-border); }
#mrApp .mr-btn:disabled { opacity: .5; cursor: default; }

#mrApp .mr-tip { text-align: center; font-size: 13px; color: var(--c-text-muted); margin-bottom: 14px; }

#mrApp .mr-sheet {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
    max-width: 860px; margin: 0 auto;
}
#mrApp .mr-item {
    background: var(--c-surface); border: 1px solid var(--c-border);
    border-radius: var(--radius-sm); padding: 14px 10px; text-align: center;
    cursor: pointer; transition: border-color .15s, background .15s;
}
#mrApp .mr-item:hover { border-color: var(--c-primary); }
#mrApp .mr-item.is-sel { border-color: var(--c-primary); background: var(--c-primary-soft); }
#mrApp .mr-no { font-size: 12px; font-weight: 700; color: var(--c-text-muted); margin-bottom: 8px; }

#mrApp .mr-v {
    display: inline-block; font-family: "Consolas", "Courier New", monospace;
    font-size: 24px; font-weight: 700; color: var(--c-text); line-height: 1.5;
}
#mrApp .mr-line { white-space: pre; text-align: right; min-width: 120px; }
#mrApp .mr-line.op { color: var(--c-primary); }
#mrApp .mr-line.bar { color: var(--c-border); letter-spacing: -1px; }
#mrApp .mr-box { color: var(--c-primary); }
#mrApp .mr-fill { color: #e03131; text-decoration: underline; }
#mrApp .mr-ans { font-size: 13px; color: var(--c-text-muted); margin-top: 8px; }

#mrApp .mr-ai, #mrApp .mr-info { max-width: 760px; margin: 30px auto 0; }
#mrApp .mr-ai h2, #mrApp .mr-info h2 { font-size: 20px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#mrApp .mr-ai p { font-size: 14px; color: var(--c-text-sub); line-height: 1.8; margin-bottom: 14px; }
#mrApp .mr-ai-row { display: flex; gap: 10px; flex-wrap: wrap; }
#mrApp .mr-out {
    margin-top: 14px; background: var(--c-surface-soft); border: 1px solid var(--c-border);
    border-radius: var(--radius-sm); padding: 16px 18px;
    font-size: 15px; line-height: 1.85; color: var(--c-text); white-space: pre-wrap;
}
#mrApp .mr-info ul { list-style: disc; padding-left: 22px; margin-bottom: 24px; }
#mrApp .mr-info li { font-size: 14px; line-height: 1.9; color: var(--c-text-sub); margin-bottom: 8px; }
#mrApp .mr-info li b { color: var(--c-text); }

@media (max-width: 700px) {
    #mrApp .mr-sheet { grid-template-columns: repeat(2, 1fr); }
    #mrApp .mr-hero h1 { font-size: 24px; }
}
@media (max-width: 420px) {
    #mrApp .mr-sheet { grid-template-columns: 1fr; }
}

/* 打印：只输出题卡 */
@media print {
    body * { visibility: hidden !important; }
    #mrSheet, #mrSheet * { visibility: visible !important; }
    #mrSheet {
        position: absolute !important; left: 0; top: 0; width: 100%;
        display: grid !important; grid-template-columns: repeat(3, 1fr) !important; gap: 12px;
    }
    #mrApp .mr-item { border: 1px solid #999 !important; page-break-inside: avoid; }
}